/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInterface.h
Precache PSOs which can be used for this material for the given vertex factory type and material paramaters
FGraphEventArray PrecachePSOs ( const [FVertexFactoryType](API\Runtime\RenderCore\FVertexFactoryType) * VertexFactoryType, const struct [FPSOPrecacheParams](API\Runtime\Engine\FPSOPrecacheParams) & PreCacheParams )